/*
 * Copyright 2004 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using System.Collections;
using NUnit.Framework;

namespace Spring.Objects.Factory.Config;

/// <summary>
/// Unit tests for the DictionaryFactoryObject class.
/// </summary>
/// <author>Rick Evans</author>
[TestFixture]
public sealed class DictionaryFactoryObjectTests
{
    [Test]
    public void SetTargetDictionaryTypeToNonDictionaryType()
    {
        DictionaryFactoryObject dfo = new DictionaryFactoryObject();
        Assert.Throws<ArgumentException>(() => dfo.TargetDictionaryType = typeof(ICollection), "The Type passed to the TargetDictionaryType property must implement the 'System.Collections.IDictionary' interface.");
    }

    [Test]
    public void SetTargetDictionaryTypeToDerivedIDictionaryInterfaceType()
    {
        DictionaryFactoryObject dfo = new DictionaryFactoryObject();
        Assert.Throws<ArgumentException>(() => dfo.TargetDictionaryType = typeof(IExtendedDictionary), "The Type passed to the TargetDictionaryType property cannot be an interface; it must be a concrete class that implements the 'System.Collections.IDictionary' interface.");
    }

    [Test]
    public void SetTargetDictionaryTypeToAbstractIDictionaryInterfaceType()
    {
        DictionaryFactoryObject dfo = new DictionaryFactoryObject();
        Assert.Throws<ArgumentException>(() => dfo.TargetDictionaryType = typeof(AbstractDictionary), "The Type passed to the TargetDictionaryType property cannot be abstract (MustInherit in VisualBasic.NET); it must be a concrete class that implements the 'System.Collections.IDictionary' interface.");
    }

    private interface IExtendedDictionary : IDictionary
    {
    }

    private abstract class AbstractDictionary : Hashtable
    {
    }

    [Test]
    public void SetTargetDictionaryTypeToNull()
    {
        DictionaryFactoryObject dfo = new DictionaryFactoryObject();
        Assert.Throws<ArgumentNullException>(() => dfo.TargetDictionaryType = null);
    }

    [Test]
    public void GetObjectWithoutSupplyingASourceDictionary()
    {
        DictionaryFactoryObject dfo = new DictionaryFactoryObject();
        dfo.IsSingleton = false;
        Assert.Throws<ArgumentException>(() => dfo.GetObject(), "The 'SourceDictionary' property cannot be null (Nothing in Visual Basic.NET).");
    }

    [Test]
    public void ObjectTypeReallyIsIDictionary()
    {
        Assert.AreEqual(typeof(IDictionary), new DictionaryFactoryObject().ObjectType);
    }

    [Test]
    public void GetObjectReallyDoesPopulateANewIDictionaryInstanceWithTheElementsOfTheSourceDictionary()
    {
        // man, that has got to be my longest ever test name :D ...
        IDictionary source = new Hashtable();
        TestObject rick = new TestObject("Rick", 30);
        source.Add(rick.Name, rick);
        TestObject mark = new TestObject("Mark", 35);
        source.Add(mark.Name, mark);
        TestObject griffin = new TestObject("Griffin", 21);
        source.Add(griffin.Name, griffin);

        DictionaryFactoryObject dfo = new DictionaryFactoryObject();
        dfo.SourceDictionary = source;
        dfo.AfterPropertiesSet();

        IDictionary dic = (IDictionary) dfo.GetObject();
        Assert.IsNotNull(dic);
        Assert.AreEqual(source.Count, dic.Count);
        foreach (DictionaryEntry entry in dic)
        {
            string name = (string) entry.Key;
            TestObject dude = (TestObject) entry.Value;
            TestObject originalDude = (TestObject) source[name];
            Assert.IsTrue(object.ReferenceEquals(dude, originalDude));
        }
    }
}
